Mercedes-Benz C-Class Complaints (2020)

46 consumer complaints on file.

#11580278March 31, 2024
ENGINE
Cylinder head is defective. Service advisor told me it was a known issue in which exhaust valves within cylinder head are prone to premature wear. If left unaddressed it leads to inevitable engine failure. I was quoted $12,000. My car is 2020 model year with not even 60,000. Barely even 4 years old.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11569947February 5, 2024
UNKNOWN OR OTHER, LATCHES/LOCKS/LINKAGES:TRUNK LID:LATCH
The issue is that the trunk lid closes abruptly and unintentionally. On Saturday, February 3, 2024, as I was putting a shopping bag in the trunk of my car, the trunk lid closed abruptly without my pressing the close button and hit my forehead. The impact was such that my eyeglasses flew off my face and hit the ground. The pain was severe and two days later, I still have pain. While there was no tear to the skin, there's a bump on my forehead and is still painful. The head injuries generally do not show adverse symptoms until months after the incident. I called the Mercedes Benz corporation and after they checked the car VIN, said there had not been any recall for this specific issue. However, searching the internet, there are reports and complaints about this exact defect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533418July 20, 2023
POWER TRAIN
The car will randomly go into a neutral condition while driving the car. This occurs about once per month, sometimes more often. I will come to a stop for a light or stop sign, upon green light I release the brakes and then gas only to find the engine free revving and the car will not move. I must place the car in Park and then Drive again in order for it to move forward. I have brought this up with Mercedes multiple times and eventually had the transmission replaced. 2 days later, the same thing happened. They do not have a repair available and are dragging their feet to fix. There is a systemic defect in the 9G tiptronic transmission. There are other reports of this transmission going into a "neutral" condition. With the C43 being a relatively lower production class in the C class lineup, I suspect the issue has not made the attention that a higher production vehicle would. I have video with the car 'in gear' and not able to move. And video evidence of the of the transmission glitch.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11527655June 19, 2023
POWER TRAIN
This has happened a couple of times to me so far. I have been driving down the road (today it was the highway) and my car fell out of gear into neutral and would not go back into gear unless I restarted the car. Every time it has happened, I have had to coast it to a safe spot to restart the car to get it back into gear. Not having power and needing to coast it to safety is a risk to others because I have no control to get myself to safety in some situations. No dealer has been able to reproduce it because of how infrequently it happens. It has happened 3 or 4 times in the last 15k miles. There were no warning messages or indications that it happened or was going to happen and no parts have been inspected. It is really scary when it happens and I hope it dosen't happen to anyone else.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11526868June 13, 2023
VISIBILITY:SUN/MOON ROOF ASSEMBLY
The contact owns a 2020 Mercedes-Benz C300. The contact stated while driving 55 MPH, the sunroof exploded without impact and glass fragments fell inside on the rear seats of the vehicle. The vehicle was taken to the dealer and the contact was informed that the sunroof needed to be replaced. The vehicle was not repaired. The contact stated that the failure had occurred twice. The manufacturer was contacted and stated that the vehicle was not under recall. No further assistance was provided. The failure mileage was 34,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11522258May 16, 2023
WHEELS:RIM
The contact owns a 2020 Mercedes-Benz AMG C43. The contact stated while driving 65 MPH, the tire pressure warning light illuminated. The contact took the vehicle to a tire center and was informed that the front passenger’s side rim cracked, causing the tire to deflate. The tire center repaired the original rim. The failure recurred with the rear driver’s and rear passenger’s side rims. The contact stated that the wheels were the original wheels on the vehicle. The vehicle was not diagnosed after the most recent failure. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11516496April 11, 2023
BACK OVER PREVENTION
The contact owns a 2020 Mercedes-Benz AMG C43. The contact received notification of NHTSA Campaign Number: 22V232000 (Back Over Prevention) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11505594February 4, 2023
POWER TRAIN
Car randomly goes into neutral despite being in D drive mode. Often at stop light, after the light turns green, the car revs up but is not in gear despite in 'D' drive. I have to shift to park or turn car off then on to get it to go again. This has happens multiple times since new. This is very random and distressing when it happens. Car has been evaluated multiple times at the dealership. There are no trouble codes thrown. The car otherwise works and has no other problem. The technician (off the record) told me there is a known issue when he contacted Germany. Official response to me is that it is perfectly fine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11497171December 13, 2022
ENGINE, POWER TRAIN, FUEL/PROPULSION SYSTEM
CEL with multiple cylinder misfires. Oil leak on top side of engine bank 2 in valley of injectors. Multiple codes for turbo charger faults and also clogged catalytic converters. Dealer confirmed and manufacturer denied federal emissions warranty on vehicle. Due to a modification that plays no role in the power train.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490902October 25, 2022
FUEL/PROPULSION SYSTEM, FORWARD COLLISION AVOIDANCE: WARNINGS
The component that failed was the fuel injector and spark plug. A few months prior to this incident, I was making a left hand turn, when the accelerator completely gave out. I was making the left on a blinking yellow arrow, luckily the on coming car was not coming at me fast or I would've been in an accident due to the accelerator failing. I had to pull over, turn the car off and then back on to reset it. I was told by the dealership service center that they could not find anything and that there have been no complaints or recalls. After about 8 months of owning the vehicle, it started to have problems turning over when the engine on/off button was pressed. I was repeatedly told that they could not do anything if it did not happen in the dealership service center. This past week on 10/20/2022, while I was driving down the freeway, when I went to accelerate and at that moment the vehicle began to stutter/shake uncontrollably. After that, any time the accelerator was pressed it would shutter/shake. My vehicle was towed to a dealership. Come to find out, cylinder one was coding. They found out that the fuel injector was stuck open. According to the service advisor, that issue was causing a misfire. I was told that they replaced the fuel injector and the spark plug. According to the vehicle report I was given, 1 reman injector, 4 TS spring F In, 1 spark plug, and there was a core return (not sure what that means). The check engine light came on right away. In addition to the incidents above, I have had the forward collision alert come on when nothing is in front of me. I worry that one day it will cause my vehicle to engage the brakes when nothing is around.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11490119October 20, 2022
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
******* DELETE VOQ ******* THIS COMPLAINT IS BEING MARKED FOR DELETION BECAUSE THE CONSUMER PLACED THE REQUEST.*DJR ******* DELETE VOQ *******
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11475739July 25, 2022
BACK OVER PREVENTION
The contact owns a 2020 Mercedes-Benz C300. The contact was reversing out of her driveway at 3 MPH, the contact was using her rearview camera. The contact stated that the image froze and she crashed into a parked vehicle with the rear passenger side bumper of her vehicle. The contacts bumper was scratched and dented. The other vehicle had sustained a large dent in the driver’s side door. The contact stated no warning light was illuminated. The contact had taken the vehicle to a local repair and not a dealer or an independent mechanic. The vehicle had been repaired cosmetically. The manufacturer had not been informed of the failure. The contact had received the manufacturer recall letter and related the accident to NHTSA Campaign Number: 22V232000 (Back Over Prevention). The failure mileage was approximately 6500.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11474717July 19, 2022
TIRES:TREAD/BELT
OEM tires that the Mercedes Benz dealership diagnosed as having shifted belts. 245/40 R18
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11473023July 9, 2022
UNKNOWN OR OTHER
Vehicle is trying to be sold with this condition
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11469155June 14, 2022
BACK OVER PREVENTION
The contact owns a 2020 Mercedes-Benz C300. The contact stated that suddenly the vehicle's sensors were illuminating and activating a warning stated that the sensors were defective. Many of the vehicle's sensors began to deactivate and malfunction. While reversing out of a parking space the rear view camera and sensor system failed causing the contact to crash into another vehicle. Both vehicles were damaged. A police report was filed. There were no injuries reported. The vehicle was not towed. The contact took the vehicle to a repair facility and stated that there was damage to the internal sensor and camera system. The contact took the vehicle to the dealer however the vehicle had not been diagnosed or repaired as of yet. The contact then received a recall notice NHTSA Campaign Number: 22V232000 (BACK OVER PREVENTION) however the VIN tool confirms remedy not yet available. The manufacturer was not made aware of the failure. The approximate failure mileage was 3,000.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11452817February 18, 2022
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, FORWARD COLLISION AVOIDANCE: WARNINGS
Automatic emergency braking system & forward collision warning. I experienced a medical emergency and blacked out, hitting 3 cars. The incident happened the morning of Dec. 31, 2021 and my car still has not been evaluated by Mercedes. I was taken to the ER and spent 3 days in the hospital.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11428078August 6, 2021
AIR BAGS
On July 17, 2021 I was driving at the posted rate of speed down I-275 Southbound here in Michigan. All of the sudden and without warning, there was a loud explosion which happened, from as near as I can tell, in the driver's side windshield pillar, where there is an airbag. No warning lights came on, and the car did not change its driving characteristics. Only after I reached my destination and searched under the dash, and every where else (including the exterior), did I find that the plastic "cover" on the pillar is pushed away from the pillar and much more loose than the plastic cover on the passenger side. Since the incident, I have had severe tinnitus in my left ear which was about 15-18" away from it. The air bag did not deploy. I did not hit a pothole, did not hit a bump, did not hit another vehicle.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11424403July 12, 2021
UNKNOWN OR OTHER
My car has failed to accelerate after being stopped. The first time, I was attempting to enter a shopping center parking lot by making a left turn across a busy road. When I engaged the gas pedal, the car finally got to 5MPH when I got into the parking lot. It was unsettling sitting in the road watching cars coming to you!! Then it did it again last week at the entrance to our complex. That time, I just turned it off and restarted it and it was fine. If it had not moved, I would have had the entire complex entrance blocked. I took it to Mercedes-Benz of Athens on 7/8 for 10,000 mile service. I informed them of the issue. The outcome this was "we unplugged a few things and hopefully this resets things". If you have the issue, bring the car in again! WOW!!! Is this before or after someone broadsides me? I think a vehicle that can not be depended on to accelerate when needed is dangerous to drive!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11423100July 1, 2021
STEERING, UNKNOWN OR OTHER
While driving on the turnpike without warning my steering locked and I lost control of my car.
Crash:
Yes
Fire:
No
Injuries:
2
Deaths:
0
#11418528May 25, 2021
ELECTRICAL SYSTEM
The contact owns a 2020 Mercedes-Benz C300. The contact stated that her son was driving at an undisclosed speed when another vehicle's muffler detached and crashed into the undercarriage of the contact's vehicle. The front driver and passenger side tires exploded and fractured the rims. The contact stated that the vehicle's alert system failed to warn her son of the incoming object which resulted in the collision. The contact's son did not receive medical attention. A police report was filed. The vehicle was towed to the dealer and repaired. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was 6,000.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0

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